The reason why I'm asking about a dual exhaust set up is because I don't want all the noise of a single pipe exhaust. SimmoES gave me some good info on THIS topic, but the more I think and try to find a solution, the more confused I become!

Simply put, I plan on getting Injen's CAI (with hydroshield... better safe than sorry) and I want a dual exhaust set up that will best accompany it (or a quiet single exhaust setup if possible).

Depending on how much money you want to spend, here are your options.

1) the best. Do a full exhaust swap, headers if you like, high flow cat, high flow resonator 2.5 piping from header all the way back (make sure ur resonator and cat is laso 2.5 in/out). Towards the end of the car where you can split, put a y pipe (or T pipe depending on how your setup would work and how much space you got to work with). The y pipe in should be 2.5 out should be 2". Put 2" pipe, then resonator and then muffler on each end symmetrically.

2) whatever you wanna do in the front, just make sure its either stock width or wider, but not wider than 2.5". Add an additional resonator (if u are keeping stock one) towards the back, split the pipes into two 2" and then attach mufflers.

Remember, adding additional resonators DO NOT affect your performance as long as they are the same width as your piping, so dont be afraid to put more than one. Not having a muffler will still make your car growl, but resonators will take away all the RASPY crap that civics are known for.

So what do you think this would run? I have an exhaust shop that all I have to do is call and I can be in the door.

depends which option you go with.. anywhere from $300-800 or even a thousand.. also depends on what kind of mufflers you get.. Most muffler shops wont be able to get discounts on greddy Ti-C for example. so if you are set on those, id recommend calling greddy directly and grabbing a pair (just mufflers, it would be cheaper than getting lancer specific ones).

id hit up "evosoul" if i were you man..he made his custom duals..
he seems pretty knowledgable (sp?) as well..so he could probly help you will everything

How about a resonator into a Borala or Flowmaster muffler that has a 1 in 2 out, and that can act as your Y pipe. and then just get some nice tips.

a few people PM'd me lately to weigh in. If your going to do any custom work, single or dual. Do make the mistakes that are unfortunately common. ensure you have the proper sectional piping. Do not attempt to weld everything on into one continuous pipe from the header all the way back to the tip. Pipes have flex to them for a reason. The pipe over time will crack.

Dual exhaust is tricky, but the best way to do it is with a single canister dual tip configuration. if you attempt a Y pipe configuration split you will bastardize exhaust flow because their is not enough velocity to overcome the split. It makes the job easy but performance will suffer.

Also the dimensions of the canister is important as well, people have to understand that exhaust flow has two stages, technically three. When I say three, the header is a very dynamic case but not really relavant to answer this direct question. but the flow before, thru, and after the CAT is one stage, and flow hitting the Muffler. Canister flow changes the dynamic of flow, it can enhance, it in some ways if the sizing and flow is right or it can kill it.

You can read my blurb on piping size here http://tolancer.com/index.php?option=com_c...w&id=6&Itemid=2

I hope that helps, if not pm me

cheers

Dear Evosoul...

Wow... seriously... wow. That's an IMMENSE amount of information! I was able to take in a lot of good info and now I hope I can actually come up with a configuration that works best for my car (to each their own, right?). I don't plan on turbo'ing, so I'd rather have the TQ gain instead of HP.

Besides... HP sells cars, but TQ wins races!

Good info EvoSoul!! I never brought up the 1in 2out muffler setup cuz i simply thought people specifically wanted 2 mufflers hanging out the back (the import tuner style) - where as the 1in 2 out and nice tips out the back is usually setup muscle cars and V8s go with.